Most prebuilt PCs can be upgraded, but ease depends heavily on the specific brand and model. Boutique builders like iBuyPower and CyberPowerPC generally use standard, off-the-shelf parts that upgrade like any custom build. Some larger OEM brands, including certain Dell and HP models, use proprietary parts that limit what you can swap in later.
- Boutique-brand prebuilts generally use standard, upgradable parts.
- Some larger OEM brands use proprietary motherboards or PSUs.
- Always check your exact model’s specifications before buying upgrades.
- GPU and storage upgrades are usually the easiest across most brands.
Why Upgradability Varies So Much
Not every prebuilt is engineered the same way. Boutique builders assemble systems from parts anyone could buy at retail, since their business model is built around competitive pricing on standard hardware. Some larger manufacturers, on the other hand, design custom form factors specifically to control costs at scale and, in some cases, to steer customers toward their own paid upgrade or repair services rather than third-party components.
What’s Usually Easy to Upgrade
- Storage: Adding a second SSD or HDD is straightforward on nearly every prebuilt with a free drive bay or M.2 slot
- RAM: Most prebuilts use standard DIMM slots, though check your exact model’s supported RAM type and maximum capacity first
- Graphics card: This is the most commonly upgraded part, though power supply wattage is the limiting factor to check first
What to Check Before Attempting a CPU or Motherboard Upgrade
- Confirm whether your motherboard is a standard ATX-family size, or a proprietary form factor that won’t fit a standard replacement case or board.
- Check your power supply’s form factor. Some large OEM brands use a smaller, proprietary PSU shape that doesn’t accept standard ATX replacement units.
- Look up your exact model number alongside “upgrade” or “teardown” to find community reports from other owners of the same system.
Power Supply Wattage: The First Thing to Check for a GPU Upgrade
Many prebuilts, especially budget-tier office-style systems repurposed for light gaming, ship with a power supply sized only for the original components. Before buying a new graphics card, confirm your PSU’s wattage and available power connectors, similar to the checks covered in how to install a graphics card.
Tip: searching your exact prebuilt model number online, alongside the specific upgrade you’re considering, usually surfaces other owners who’ve already documented what worked and what didn’t on that exact system.
When to Just Replace the Whole System Instead
If your prebuilt uses genuinely proprietary parts throughout, following proprietary parts in prebuilt PCs for how to identify this, a full new build may end up more practical and cost-effective than working around restrictive engineering choices piece by piece.
For more detail on specific bottlenecks, see benchmark comparisons from TechPowerUp, part compatibility tools from PCPartPicker, and community upgrade experiences on r/buildapc.
Frequently Asked Questions
Can I upgrade the GPU in any prebuilt PC?
In most cases yes, as long as the power supply has enough wattage and the case has physical room, though some proprietary systems may need extra care or adapters.
Are boutique prebuilts easier to upgrade than big-brand ones?
Generally yes, since boutique builders typically use standard retail parts, while some larger OEM brands use proprietary components that limit options.
Does upgrading a prebuilt void its warranty?
It depends on the specific builder’s policy. Some explicitly allow component upgrades, while others may restrict coverage after internal changes.
How do I know if my prebuilt has proprietary parts?
Check your exact model number against community teardown reports, or measure the motherboard and power supply against standard ATX dimensions.
